There were articles in the May and June 1998 QST about building TX/RX bandpass filters ,by Edward Wetherhold ,W3NQN . ARRL members can get them in the "Members-only" area online ,as an Acrobat file .Also , K1TTT has some fine information on stubs and other filters . I haven't used any of these yet,but intend to try some stubs on Field Day. Check the Tech Notes on his page http://www.k1ttt.net/k1ttt.html
I hope this helps . E-mail me ( firstname.lastname@example.org
)if you need help with the articles.
Russ , WA5EE